C103 — Four new source records join the named carrier rows to the retained Mirror graph

22 September 2026 · Step 1 of the authorized ten-step Mirror continuation (C103–C112).

The existing graph already contains the MT G1 Flood at 2456 as opening_MT_Flood. Reusing that exact record is consequential: the apparent row connects the earlier opening construction to N02 through its shared Flood and Noah endpoints.

Only four new records are needed: apparent Creation closing −4444 and the original cumulative Joseph heads 1904, 1906 and 1908. The Joseph heads are derived from Kohath members 1794, 1796 and 1798 plus 110. They are member selections, without regular Gears.

The two displayed nine-cell grids contain 18 slots but only 15 distinct typed intervals because their apparent row is shared. Eight intervals already occur in C43; seven duration edges are added. The full graph and slot-to-edge mapping are included in the certificate.

N04's lower MT Flood 2458 is precisely N02's upper MT Flood, so it reuses N02_f. By contrast, G1/G2 Noah records remain separate. Event type, chronology profile, Gear, boundary class and projection are checked along with the coordinate; matching numbers alone do not authorize a merge. The frozen baseline is preserved, with the extension explicitly named C103.

Validation. 10 exact arithmetic/structural checks passed. The 12 frozen dependencies passed hash verification; all three generated outputs replayed byte for byte in isolation, and the original dependencies remained unchanged. This step reads completed certificates and does not execute their campaigns.

Scope and provenance. Controlling File_18 and File_09 remain unchanged. Regular Gears apply only to Noah/Shem/Flood; SP person companions only to Noah/Shem. Creation and Conquest fields remain fixed. Native LXX ON, explicitly derived OFF, independent Flood start/close, and paired suffix inversion at January AD 1 remain in force. No civil year zero, upstream Gear transport, primers, Rounded campaign, or localized −33 is introduced. These are new continuation reports, not recovered historical Reports 11–25. Evidence is conditional on the supplied project model, not a proof of literary intention or independent historical dating.

Source locators. File_09 §3 and Appendix A (paired Mirror); File_18 §§2.1.3, 3.1 and 6A (regular fields and cumulative source members); File_61 §11.2 (original backward Joseph +110); File_62 collateral-scope guards; C05 admitted apparent field; C43 frozen graph; C95 and C100–C102 named carrier rows; preceding current certificates. The forthcoming 529 × 4 × 2 cycle has not been explored. The declared phase model does not infer an unstated birthday or event month from an annual source row.

Best next bounded step — High sufficient. Audit the exact rank of the seven added width relations relative to the frozen graph, separating new coordinates from connections among existing components.